1 files changed, 211 insertions, 0 deletions
diff --git a/spec/spec_test.go b/spec/spec_test.go
new file mode 100644
index 0000000..54d7b7d
--- /dev/null
+++ b/spec/spec_test.go
@@ -0,0 +1,211 @@
+package spec
+
+import (
+	"fmt"
+	"testing"
+)
+
+var idTests = []struct {
+	id      string
+	invalid bool
+}{
+	{
+		id: "foo",
+	},
+	{
+		id: "foo2",
+	},
+	{
+		id: "foo_bar_baz",
+	},
+	{
+		id: "f_o_o",
+	},
+	{
+		id:      "2foo",
+		invalid: true,
+	},
+	{
+		id:      "_foo",
+		invalid: true,
+	},
+	{
+		id:      "foo_",
+		invalid: true,
+	},
+	{
+		id:      "foo__bar",
+		invalid: true,
+	},
+}
+
+func TestValidateIdentifier(t *testing.T) {
+	for _, tt := range idTests {
+		t.Run(tt.id, func(t *testing.T) {
+			err := validateIdentifier(tt.id)
+			if tt.invalid {
+				if err == nil {
+					t.Errorf("expected error didn't occur")
+				}
+			} else {
+				if err != nil {
+					t.Errorf("unexpected error occurred: %v", err)
+				}
+			}
+		})
+	}
+}
+
+func TestLexKindName_validate(t *testing.T) {
+	for _, tt := range idTests {
+		t.Run(tt.id, func(t *testing.T) {
+			err := LexKindName(tt.id).validate()
+			if tt.invalid {
+				if err == nil {
+					t.Errorf("expected error didn't occur")
+				}
+			} else {
+				if err != nil {
+					t.Errorf("unexpected error occurred: %v", err)
+				}
+			}
+		})
+	}
+}
+
+func TestLexModeName_validate(t *testing.T) {
+	for _, tt := range idTests {
+		t.Run(tt.id, func(t *testing.T) {
+			err := LexModeName(tt.id).validate()
+			if tt.invalid {
+				if err == nil {
+					t.Errorf("expected error didn't occur")
+				}
+			} else {
+				if err != nil {
+					t.Errorf("unexpected error occurred: %v", err)
+				}
+			}
+		})
+	}
+}
+
+func TestSnakeCaseToUpperCamelCase(t *testing.T) {
+	tests := []struct {
+		snake string
+		camel string
+	}{
+		{
+			snake: "foo",
+			camel: "Foo",
+		},
+		{
+			snake: "foo_bar",
+			camel: "FooBar",
+		},
+		{
+			snake: "foo_bar_baz",
+			camel: "FooBarBaz",
+		},
+		{
+			snake: "Foo",
+			camel: "Foo",
+		},
+		{
+			snake: "fooBar",
+			camel: "FooBar",
+		},
+		{
+			snake: "FOO",
+			camel: "FOO",
+		},
+		{
+			snake: "FOO_BAR",
+			camel: "FOOBAR",
+		},
+		{
+			snake: "_foo_bar_",
+			camel: "FooBar",
+		},
+		{
+			snake: "___foo___bar___",
+			camel: "FooBar",
+		},
+	}
+	for _, tt := range tests {
+		c := SnakeCaseToUpperCamelCase(tt.snake)
+		if c != tt.camel {
+			t.Errorf("unexpected string; want: %v, got: %v", tt.camel, c)
+		}
+	}
+}
+
+func TestFindSpellingInconsistencies(t *testing.T) {
+	tests := []struct {
+		ids        []string
+		duplicated [][]string
+	}{
+		{
+			ids:        []string{"foo", "foo"},
+			duplicated: nil,
+		},
+		{
+			ids:        []string{"foo", "Foo"},
+			duplicated: [][]string{{"Foo", "foo"}},
+		},
+		{
+			ids:        []string{"foo", "foo", "Foo"},
+			duplicated: [][]string{{"Foo", "foo"}},
+		},
+		{
+			ids:        []string{"foo_bar_baz", "FooBarBaz"},
+			duplicated: [][]string{{"FooBarBaz", "foo_bar_baz"}},
+		},
+		{
+			ids:        []string{"foo", "Foo", "bar", "Bar"},
+			duplicated: [][]string{{"Bar", "bar"}, {"Foo", "foo"}},
+		},
+		{
+			ids:        []string{"foo", "Foo", "bar", "Bar", "baz", "bra"},
+			duplicated: [][]string{{"Bar", "bar"}, {"Foo", "foo"}},
+		},
+	}
+	for i, tt := range tests {
+		t.Run(fmt.Sprintf("#%v", i), func(t *testing.T) {
+			duplicated := FindSpellingInconsistencies(tt.ids)
+			if len(duplicated) != len(tt.duplicated) {
+				t.Fatalf("unexpected IDs; want: %#v, got: %#v", tt.duplicated, duplicated)
+			}
+			for i, dupIDs := range duplicated {
+				if len(dupIDs) != len(tt.duplicated[i]) {
+					t.Fatalf("unexpected IDs; want: %#v, got: %#v", tt.duplicated[i], dupIDs)
+				}
+				for j, id := range dupIDs {
+					if id != tt.duplicated[i][j] {
+						t.Fatalf("unexpected IDs; want: %#v, got: %#v", tt.duplicated[i], dupIDs)
+					}
+				}
+			}
+		})
+	}
+}
+
+func TestLexSpec_Validate(t *testing.T) {
+	// We expect that the spelling inconsistency error will occur.
+	spec := &LexSpec{
+		Entries: []*LexEntry{
+			{
+				Modes: []LexModeName{
+					// 'Default' is the spelling inconsistency because 'default' is predefined.
+					"Default",
+				},
+				Kind:    "foo",
+				Pattern: "foo",
+			},
+		},
+	}
+	err := spec.Validate()
+	if err == nil {
+		t.Fatalf("expected error didn't occur")
+	}
+}