1 files changed, 169 insertions, 0 deletions
diff --git a/tests/unit/tester.go b/tests/unit/tester.go
new file mode 100644
index 0000000..3c6b1db
--- /dev/null
+++ b/tests/unit/tester.go
@@ -0,0 +1,169 @@
+package tester
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+
+	"urubu/grammar"
+	"urubu/spec/grammar/parser"
+	tspec "urubu/spec/test"
+)
+
+func TestTester_Run(t *testing.T) {
+	grammarSrc1 := `
+#name test;
+
+s
+    : foo bar baz
+    | foo error baz #recover
+    ;
+
+ws #skip
+    : "[\u{0009}\u{0020}]+";
+foo
+    : 'foo';
+bar
+    : 'bar';
+baz
+    : 'baz';
+`
+
+	grammarSrc2 := `
+#name test;
+
+s
+    : foos
+    ;
+foos
+    : foos foo #ast foos... foo
+    | foo
+    ;
+
+ws #skip
+    : "[\u{0009}\u{0020}]+";
+foo
+    : 'foo';
+`
+
+	tests := []struct {
+		grammarSrc string
+		testSrc    string
+		error      bool
+	}{
+		{
+			grammarSrc: grammarSrc1,
+			testSrc: `
+Test
+---
+foo bar baz
+---
+(s
+    (foo 'foo') (bar 'bar') (baz 'baz'))
+`,
+		},
+		{
+			grammarSrc: grammarSrc1,
+			testSrc: `
+Test
+---
+foo ? baz
+---
+(s
+    (foo 'foo') (error) (baz 'baz'))
+`,
+		},
+		{
+			grammarSrc: grammarSrc1,
+			testSrc: `
+Test
+---
+foo bar baz
+---
+(s)
+`,
+			error: true,
+		},
+		{
+			grammarSrc: grammarSrc1,
+			testSrc: `
+Test
+---
+foo bar baz
+---
+(s
+    (foo) (bar))
+`,
+			error: true,
+		},
+		{
+			grammarSrc: grammarSrc1,
+			testSrc: `
+Test
+---
+foo bar baz
+---
+(s
+    (foo) (bar) (xxx))
+`,
+			error: true,
+		},
+		{
+			grammarSrc: grammarSrc2,
+			testSrc: `
+Test
+---
+foo foo foo
+---
+(s
+    (foos
+        (foo 'foo') (foo 'foo') (foo 'foo')))
+`,
+		},
+	}
+	for i, tt := range tests {
+		t.Run(fmt.Sprintf("#%v", i), func(t *testing.T) {
+			ast, err := parser.Parse(strings.NewReader(tt.grammarSrc))
+			if err != nil {
+				t.Fatal(err)
+			}
+			b := grammar.GrammarBuilder{
+				AST: ast,
+			}
+			cg, _, err := b.Build()
+			if err != nil {
+				t.Fatal(err)
+			}
+			c, err := tspec.ParseTestCase(strings.NewReader(tt.testSrc))
+			if err != nil {
+				t.Fatal(err)
+			}
+			tester := &Tester{
+				Grammar: cg,
+				Cases: []*TestCaseWithMetadata{
+					{
+						TestCase: c,
+					},
+				},
+			}
+			rs := tester.Run()
+			if tt.error {
+				errOccurred := false
+				for _, r := range rs {
+					if r.Error != nil {
+						errOccurred = true
+					}
+				}
+				if !errOccurred {
+					t.Fatal("this test must fail, but it passed")
+				}
+			} else {
+				for _, r := range rs {
+					if r.Error != nil {
+						t.Fatalf("unexpected error occurred: %v", r.Error)
+					}
+				}
+			}
+		})
+	}
+}