Add some tests

asv_test.go

@@ -0,0 +1,70 @@
+package asv
+
+import "io"
+import "strings"
+import "testing"
+import "reflect"
+
+func TestDecodeCollection (test *testing.T) {
+	decoder := NewDecoder(strings.NewReader(
+"record\x1fone\x1erecord\x1ftwo\x1drecord one in group two\x1crecord one in file two" +
+"\x1flots of \x1b\x1b\x1b\x1f\x1b\x1d\x1b\x1e\x1b\x1cescape sequences"))
+	got, err := decoder.ReadCollection()
+	testErr(test, err)
+	testEqual(test, "structures", got,
+		Collection {
+			File {
+				Group {
+					Record {
+						"record",
+						"one",
+					},
+					Record {
+						"record",
+						"two",
+					},
+				},
+				Group {
+					Record {
+						"record one in group two",
+					},
+				},
+			},
+			File {
+				Group {
+					Record {
+						"record one in file two",
+						"lots of \x1b\x1f\x1d\x1e\x1cescape sequences",
+					},
+				},	
+			},
+		})
+}
+
+func TestDecodeRecord (test *testing.T) {
+	decoder := NewDecoder(strings.NewReader(
+"record\x1fone"))
+	got, next, err := decoder.ReadRecord()
+	testEqual(test, "errors", err,  io.EOF)
+	testEqual(test, "next",   next, rune(0))
+	testEqual(test, "structures", got,
+		Record {
+			"record",
+			"one",
+		})
+}
+
+func testErr (test *testing.T, err error) {
+	if err != nil {
+		test.Fatalf("unexpected error: %v", err)
+	}
+}
+
+func testEqual (test *testing.T, desc string, got, correct any) {
+	if !reflect.DeepEqual(got, correct) {
+		test.Error(desc, "not equal")
+		test.Errorf("GOT:\n%v",     got)
+		test.Errorf("CORRECT:\n%v", correct)
+		test.FailNow()
+	}
+}