1 files changed, 67 insertions, 0 deletions
diff --git a/go/hamming/cases_test.go b/go/hamming/cases_test.go
new file mode 100644
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+++ b/go/hamming/cases_test.go
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+package hamming
+
+// Source: exercism/problem-specifications
+// Commit: 4119671 Hamming: Add a tests to avoid wrong recursion solution (#1450)
+// Problem Specifications Version: 2.3.0
+
+var testCases = []struct {
+	s1          string
+	s2          string
+	want        int
+	expectError bool
+}{
+	{ // empty strands
+		"",
+		"",
+		0,
+		false,
+	},
+	{ // single letter identical strands
+		"A",
+		"A",
+		0,
+		false,
+	},
+	{ // single letter different strands
+		"G",
+		"T",
+		1,
+		false,
+	},
+	{ // long identical strands
+		"GGACTGAAATCTG",
+		"GGACTGAAATCTG",
+		0,
+		false,
+	},
+	{ // long different strands
+		"GGACGGATTCTG",
+		"AGGACGGATTCT",
+		9,
+		false,
+	},
+	{ // disallow first strand longer
+		"AATG",
+		"AAA",
+		0,
+		true,
+	},
+	{ // disallow second strand longer
+		"ATA",
+		"AGTG",
+		0,
+		true,
+	},
+	{ // disallow left empty strand
+		"",
+		"G",
+		0,
+		true,
+	},
+	{ // disallow right empty strand
+		"G",
+		"",
+		0,
+		true,
+	},
+}