refactoring tests to make this easier

lexer_test.go

@@ -6,7 +6,7 @@ import (
 	"code.ndumas.com/ndumas/wikilink-parser"
 )
 
-func Test_ObsidianWikilinks_LinksIntext(t *testing.T) {
+func Test_ObsidianWikilinks_LinksEndOfInput(t *testing.T) {
 	tcs := []struct {
 		name     string
 		in       string
@@ -14,7 +14,7 @@ func Test_ObsidianWikilinks_LinksIntext(t *testing.T) {
 	}{
 		{
 			name: "wikilink",
-			in:   "this is a [[wikilink]]",
+			in:   "[[wikilink]]",
 			expected: []wikilink.Lexeme{
 				{Typ: wikilink.LexText, Val: "this is a "},
 				{Typ: wikilink.LexOpenLink, Val: "[["},
@@ -25,7 +25,7 @@ func Test_ObsidianWikilinks_LinksIntext(t *testing.T) {
 		},
 		{
 			name: "wikilink|display name",
-			in:   "this is a [[wikilink|display name]]",
+			in:   "is a [[wikilink|display name]]",
 			expected: []wikilink.Lexeme{
 				{Typ: wikilink.LexText, Val: "this is a "},
 				{Typ: wikilink.LexOpenLink, Val: "[["},
@@ -457,8 +457,21 @@ func Test_ObsidianWikilinks_Basic(t *testing.T) {
 	}
 
 	for _, tc := range tcs {
-		tc := tc
-		t.Run(tc.name, func(t *testing.T) {
+		mut, test := mutateTestCase(tc, "", "")
+		t.Run(mut.name, test)
+	}
+}
+
+type tc struct {
+	name     string
+	in       string
+	expected []wikilink.Lexeme
+}
+
+func mutateTestCase(tc tc, prefix, suffix string) (tc, func(t *testing.T)) {
+	tc.in = prefix + tc.in
+	tc.in = tc.in + suffix
+	return tc, func(t *testing.T) {
 		// t.Parallel()
 		l := wikilink.Lex("testLexer", tc.in)
 		defer l.L.Sync()
@@ -484,6 +497,5 @@ func Test_ObsidianWikilinks_Basic(t *testing.T) {
 				return
 			}
 		}
-		})
 	}
 }