Manual_tests.md


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I care a lot about being able to automatically check _any_ property about my
program before it ever runs. However, some things don't have tests yet, either
because I don't know how to test them or because I've been lazy. I'll at least
record those here.

Startup:

  - terminal log shows unit tests running

Initializing settings:

  - delete app settings, start; window opens running the text editor
  - quit while running the text editor, restart; window opens running the text editor in same position+dimensions
  - quit while editing source (color; no drawings; no selection), restart; window opens editing source in same position+dimensions
  - start out running the text editor, move window, press ctrl+e twice; window is running text editor in same position+dimensions
  - start out editing source, move window, press ctrl+e twice; window is editing source in same position+dimensions
  - no log file; switching to source works

Code loading:
* run love with directory; text editor runs
* run love with zip file; text editor runs

* How the screen looks. Our tests use a level of indirection to check text and
  graphics printed to screen, but not the precise pixels they translate to.
    - where exactly the cursor is drawn to highlight a given character
    - analogously, how a shape precisely looks as you draw it

* start out running the text editor, press ctrl+e to edit source, make a change to the source, press ctrl+e twice to return to the source editor; the change should be preserved.

### Other compromises

Lua is dynamically typed. Tests can't patch over lack of type-checking.

* All strings are UTF-8. Bytes within them are not characters. I try to label
  byte offsets with the suffix `_offset`, and character positions as `_pos`.
  For example, `string.sub` should never use a `_pos` to substring, only an
  `_offset`.

* Some ADT/interface support would be helpful in keeping per-line state in
  sync. Any change to line data should clear line `fragments` and
  `screen_line_starting_pos`.

* Some inputs get processed in love.textinput and some in love.keypressed.
  Several bugs have arisen due to destructive interference between the two for
  some key chord. I wish I could guarantee that the two sets are disjoint. But
  perhaps I'm not thinking about this right.

* Like any high-level language, it's easy to accidentally alias two non-scalar
  variables. I wish there was a way to require copy when assigning.

* I wish I could require pixel coordinates to be integers. The editor
  defensively converts input margins to integers.

* My test harness automatically runs `test_*` methods -- but only at the
  top-level. I wish there was a way to raise warnings if someone defines such
  a function inside a dict somewhere.
#include <stdarg.h>
#include <string.h>
#include <stddef.h>
#include <setjmp.h>
#include <cmocka.h>
#include <stdlib.h>

#include "xmpp/form.h"

xmpp_ctx_t* connection_get_ctx(void)
{
    return NULL;
}

static DataForm*
_new_form(void)
{
    DataForm *form = malloc(sizeof(DataForm));
    form->type = NULL;
    form->title = NULL;
    form->instructions = NULL;
    form->fields = NULL;
    form->var_to_tag = g_hash_table_new_full(g_str_hash, g_str_equal, free, free);
    form->tag_to_var = g_hash_table_new_full(g_str_hash, g_str_equal, free, free);
    form->tag_ac = NULL;

    return form;
}

static FormField*
_new_field(void)
{
    FormField *field = malloc(sizeof(FormField));
    field->label = NULL;
    field->type = NULL;
    field->description = NULL;
    field->required = FALSE;
    field->options = NULL;
    field->var = NULL;
    field->values = NULL;
    field->value_ac = NULL;

    return field;

}

void get_form_type_field_returns_null_no_fields(void **state)
{
    DataForm *form = _new_form();

    char *result = form_get_form_type_field(form);

    assert_null(result);

    form_destroy(form);
}

void get_form_type_field_returns_null_when_not_present(void **state)
{
    DataForm *form = _new_form();
    FormField *field = _new_field();
    field->var = strdup("var1");
    field->values = g_slist_append(field->values, strdup("value1"));
    form->fields = g_slist_append(form->fields, field);

    char *result = form_get_form_type_field(form);

    assert_null(result);

    form_destroy(form);
}

void get_form_type_field_returns_value_when_present(void **state)
{
    DataForm *form = _new_form();

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->values = g_slist_append(field1->values, strdup("value1"));
    form->fields = g_slist_append(form->fields, field1);

    FormField *field2 = _new_field();
    field2->var = strdup("FORM_TYPE");
    field2->values = g_slist_append(field2->values, strdup("value2"));
    form->fields = g_slist_append(form->fields, field2);

    FormField *field3 = _new_field();
    field3->var = strdup("var3");
    field3->values = g_slist_append(field3->values, strdup("value3"));
    form->fields = g_slist_append(form->fields, field3);

    char *result = form_get_form_type_field(form);

    assert_string_equal(result, "value2");

    form_destroy(form);
}

void get_field_type_returns_unknown_when_no_fields(void **state)
{
    DataForm *form = _new_form();

    form_field_type_t result = form_get_field_type(form, "tag");

    assert_int_equal(result, FIELD_UNKNOWN);

    form_destroy(form);
}

void get_field_type_returns_correct_type(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));
    g_hash_table_insert(form->tag_to_var, strdup("tag2"), strdup("var2"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_TEXT_SINGLE;
    field1->values = g_slist_append(field1->values, strdup("value1"));
    form->fields = g_slist_append(form->fields, field1);

    FormField *field2 = _new_field();
    field2->var = strdup("var2");
    field2->type_t = FIELD_TEXT_MULTI;
    field2->values = g_slist_append(field2->values, strdup("value2"));
    form->fields = g_slist_append(form->fields, field2);

    form_field_type_t result = form_get_field_type(form, "tag2");

    assert_int_equal(result, FIELD_TEXT_MULTI);

    form_destroy(form);
}

void set_value_adds_when_none(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));
    g_hash_table_insert(form->tag_to_var, strdup("tag2"), strdup("var2"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_TEXT_SINGLE;
    field1->values = g_slist_append(field1->values, strdup("value1"));
    form->fields = g_slist_append(form->fields, field1);

    FormField *field2 = _new_field();
    field2->var = strdup("var2");
    field2->type_t = FIELD_LIST_SINGLE;
    form->fields = g_slist_append(form->fields, field2);

    form_set_value(form, "tag2", "a new value");

    int length = 0;
    char *value = NULL;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var2") == 0) {
            length = g_slist_length(field->values);
            value = field->values->data;
            break;
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_int_equal(length, 1);
    assert_string_equal(value, "a new value");

    form_destroy(form);
}

void set_value_updates_when_one(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));
    g_hash_table_insert(form->tag_to_var, strdup("tag2"), strdup("var2"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_TEXT_SINGLE;
    form->fields = g_slist_append(form->fields, field1);

    FormField *field2 = _new_field();
    field2->var = strdup("var2");
    field2->type_t = FIELD_LIST_SINGLE;
    field2->values = g_slist_append(field2->values, strdup("value2"));
    form->fields = g_slist_append(form->fields, field2);

    form_set_value(form, "tag2", "a new value");

    int length = 0;
    char *value = NULL;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var2") == 0) {
            length = g_slist_length(field->values);
            value = field->values->data;
            break;
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_int_equal(length, 1);
    assert_string_equal(value, "a new value");

    form_destroy(form);
}

void add_unique_value_adds_when_none(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));
    g_hash_table_insert(form->tag_to_var, strdup("tag2"), strdup("var2"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_JID_MULTI;
    form->fields = g_slist_append(form->fields, field1);

    FormField *field2 = _new_field();
    field2->var = strdup("var2");
    field2->type_t = FIELD_LIST_SINGLE;
    field2->values = g_slist_append(field2->values, strdup("value2"));
    form->fields = g_slist_append(form->fields, field2);

    gboolean ret = form_add_unique_value(form, "tag1", "me@server.com");

    int length = 0;
    char *value = NULL;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var1") == 0) {
            length = g_slist_length(field->values);
            value = field->values->data;
            break;
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_true(ret);
    assert_int_equal(length, 1);
    assert_string_equal(value, "me@server.com");

    form_destroy(form);
}

void add_unique_value_does_nothing_when_exists(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));
    g_hash_table_insert(form->tag_to_var, strdup("tag2"), strdup("var2"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_JID_MULTI;
    field1->values = g_slist_append(field1->values, strdup("me@server.com"));
    form->fields = g_slist_append(form->fields, field1);

    FormField *field2 = _new_field();
    field2->var = strdup("var2");
    field2->type_t = FIELD_LIST_SINGLE;
    field2->values = g_slist_append(field2->values, strdup("value2"));
    form->fields = g_slist_append(form->fields, field2);

    gboolean ret = form_add_unique_value(form, "tag1", "me@server.com");

    int length = 0;
    char *value = NULL;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var1") == 0) {
            length = g_slist_length(field->values);
            value = field->values->data;
            break;
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_false(ret);
    assert_int_equal(length, 1);
    assert_string_equal(value, "me@server.com");

    form_destroy(form);
}

void add_unique_value_adds_when_doesnt_exist(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));
    g_hash_table_insert(form->tag_to_var, strdup("tag2"), strdup("var2"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_JID_MULTI;
    field1->values = g_slist_append(field1->values, strdup("dolan@server.com"));
    field1->values = g_slist_append(field1->values, strdup("kieran@server.com"));
    field1->values = g_slist_append(field1->values, strdup("chi@server.com"));
    form->fields = g_slist_append(form->fields, field1);

    FormField *field2 = _new_field();
    field2->var = strdup("var2");
    field2->type_t = FIELD_LIST_SINGLE;
    field2->values = g_slist_append(field2->values, strdup("value2"));
    form->fields = g_slist_append(form->fields, field2);

    gboolean ret = form_add_unique_value(form, "tag1", "me@server.com");

    int length = 0;
    int count = 0;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var1") == 0) {
            length = g_slist_length(field->values);
            GSList *curr_value = field->values;
            while (curr_value != NULL) {
                if (g_strcmp0(curr_value->data, "me@server.com") == 0) {
                    count++;
                }
                curr_value = g_slist_next(curr_value);
            }
            break;
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_true(ret);
    assert_int_equal(length, 4);
    assert_int_equal(count, 1);

    form_destroy(form);
}

void add_value_adds_when_none(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_LIST_MULTI;
    form->fields = g_slist_append(form->fields, field1);

    form_add_value(form, "tag1", "somevalue");

    int length = 0;
    char *value = NULL;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var1") == 0) {
            length = g_slist_length(field->values);
            value = field->values->data;
            break;
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_int_equal(length, 1);
    assert_string_equal(value, "somevalue");

    form_destroy(form);
}

void add_value_adds_when_some(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_LIST_MULTI;
    field1->values = g_slist_append(field1->values, strdup("some text"));
    field1->values = g_slist_append(field1->values, strdup("some more text"));
    field1->values = g_slist_append(field1->values, strdup("yet some more text"));
    form->fields = g_slist_append(form->fields, field1);

    form_add_value(form, "tag1", "new value");

    int num_values = 0;
    int new_value_count = 0;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var1") == 0) {
            GSList *curr_value = field->values;
            while (curr_value != NULL) {
                num_values++;
                if (g_strcmp0(curr_value->data, "new value") == 0) {
                    new_value_count++;
                }
                curr_value = g_slist_next(curr_value);
            }
            break;
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_int_equal(num_values, 4);
    assert_int_equal(new_value_count, 1);

    form_destroy(form);
}

void add_value_adds_when_exists(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_LIST_MULTI;
    field1->values = g_slist_append(field1->values, strdup("some text"));
    field1->values = g_slist_append(field1->values, strdup("some more text"));
    field1->values = g_slist_append(field1->values, strdup("yet some more text"));
    field1->values = g_slist_append(field1->values, strdup("new value"));
    form->fields = g_slist_append(form->fields, field1);

    form_add_value(form, "tag1", "new value");

    int num_values = 0;
    int new_value_count = 0;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var1") == 0) {
            GSList *curr_value = field->values;
            while (curr_value != NULL) {
                num_values++;
                if (g_strcmp0(curr_value->data, "new value") == 0) {
                    new_value_count++;
                }
                curr_value = g_slist_next(curr_value);
            }
            break;
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_int_equal(num_values, 5);
    assert_int_equal(new_value_count, 2);

    form_destroy(form);
}

void remove_value_does_nothing_when_none(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_LIST_MULTI;
    form->fields = g_slist_append(form->fields, field1);

    gboolean res = form_remove_value(form, "tag1", "some value");

    int length = -1;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var1") == 0) {
            length = g_slist_length(field->values);
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_false(res);
    assert_int_equal(length, 0);

    form_destroy(form);
}

void remove_value_does_nothing_when_doesnt_exist(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_LIST_MULTI;
    field1->values = g_slist_append(field1->values, strdup("value1"));
    field1->values = g_slist_append(field1->values, strdup("value2"));
    field1->values = g_slist_append(field1->values, strdup("value3"));
    field1->values = g_slist_append(field1->values, strdup("value4"));
    form->fields = g_slist_append(form->fields, field1);

    gboolean res = form_remove_value(form, "tag1", "value5");

    int length = -1;
    int value_count = 0;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var1") == 0) {
            length = g_slist_length(field->values);
            GSList *curr_value = field->values;
            while (curr_value != NULL) {
                if (g_strcmp0(curr_value->data, "value5") == 0) {
                    value_count++;
                }
                curr_value = g_slist_next(curr_value);
            }
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_false(res);
    assert_int_equal(length, 4);
    assert_int_equal(value_count, 0);

    form_destroy(form);
}

void remove_value_removes_when_one(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_LIST_MULTI;
    field1->values = g_slist_append(field1->values, strdup("value4"));
    form->fields = g_slist_append(form->fields, field1);

    gboolean res = form_remove_value(form, "tag1", "value4");

    int length = -1;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var1") == 0) {
            length = g_slist_length(field->values);
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_true(res);
    assert_int_equal(length, 0);

    form_destroy(form);
}

void remove_value_removes_when_many(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_LIST_MULTI;
    field1->values = g_slist_append(field1->values, strdup("value1"));
    field1->values = g_slist_append(field1->values, strdup("value2"));
    field1->values = g_slist_append(field1->values, strdup("value3"));
    field1->values = g_slist_append(field1->values, strdup("value4"));
    form->fields = g_slist_append(form->fields, field1);

    gboolean res = form_remove_value(form, "tag1", "value2");

    int length = -1;
    int value_count = 0;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var1") == 0) {
            length = g_slist_length(field->values);
            GSList *curr_value = field->values;
            while (curr_value != NULL) {
                if (g_strcmp0(curr_value->data, "value2") == 0) {
                    value_count++;
                }
                curr_value = g_slist_next(curr_value);
            }
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_true(res);
    assert_int_equal(length, 3);
    assert_int_equal(value_count, 0);

    form_destroy(form);
}

void remove_text_multi_value_does_nothing_when_none(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_LIST_MULTI;
    form->fields = g_slist_append(form->fields, field1);

    gboolean res = form_remove_text_multi_value(form, "tag1", 3);

    int length = -1;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var1") == 0) {
            length = g_slist_length(field->values);
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_false(res);
    assert_int_equal(length, 0);

    form_destroy(form);
}

void remove_text_multi_value_does_nothing_when_doesnt_exist(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_LIST_MULTI;
    field1->values = g_slist_append(field1->values, strdup("value1"));
    field1->values = g_slist_append(field1->values, strdup("value2"));
    field1->values = g_slist_append(field1->values, strdup("value3"));
    field1->values = g_slist_append(field1->values, strdup("value4"));
    form->fields = g_slist_append(form->fields, field1);

    gboolean res = form_remove_text_multi_value(form, "tag1", 5);

    int length = -1;
    int value_count = 0;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var1") == 0) {
            length = g_slist_length(field->values);
            GSList *curr_value = field->values;
            while (curr_value != NULL) {
                if (g_strcmp0(curr_value->data, "value5") == 0) {
                    value_count++;
                }
                curr_value = g_slist_next(curr_value);
            }
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_false(res);
    assert_int_equal(length, 4);
    assert_int_equal(value_count, 0);

    form_destroy(form);
}

void remove_text_multi_value_removes_when_one(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_LIST_MULTI;
    field1->values = g_slist_append(field1->values, strdup("value4"));
    form->fields = g_slist_append(form->fields, field1);

    gboolean res = form_remove_text_multi_value(form, "tag1", 1);

    int length = -1;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var1") == 0) {
            length = g_slist_length(field->values);
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_true(res);
    assert_int_equal(length, 0);

    form_destroy(form);
}

void remove_text_multi_value_removes_when_many(void **state)
{
    DataForm *form = _new_form();
    g_hash_table_insert(form->tag_to_var, strdup("tag1"), strdup("var1"));

    FormField *field1 = _new_field();
    field1->var = strdup("var1");
    field1->type_t = FIELD_LIST_MULTI;
    field1->values = g_slist_append(field1->values, strdup("value1"));
    field1->values = g_slist_append(field1->values, strdup("value2"));
    field1->values = g_slist_append(field1->values, strdup("value3"));
    field1->values = g_slist_append(field1->values, strdup("value4"));
    form->fields = g_slist_append(form->fields, field1);

    gboolean res = form_remove_text_multi_value(form, "tag1", 2);

    int length = -1;
    int value_count = 0;
    GSList *curr_field = form->fields;
    while (curr_field != NULL) {
        FormField *field = curr_field->data;
        if (g_strcmp0(field->var, "var1") == 0) {
            length = g_slist_length(field->values);
            GSList *curr_value = field->values;
            while (curr_value != NULL) {
                if (g_strcmp0(curr_value->data, "value2") == 0) {
                    value_count++;
                }
                curr_value = g_slist_next(curr_value);
            }
        }
        curr_field = g_slist_next(curr_field);
    }

    assert_true(res);
    assert_int_equal(length, 3);
    assert_int_equal(value_count, 0);

    form_destroy(form);
}