re s/guuid/uuid/g

1 files changed, 261 insertions, 0 deletions

diff --git a/tests/uuid.go b/tests/uuid.go
new file mode 100644
index 0000000..ad9cac4
--- /dev/null
+++ b/tests/uuid.go
@@ -0,0 +1,261 @@
+package uuid
+
+import (
+	"bytes"
+	"encoding/hex"
+	"fmt"
+	"os"
+	"reflect"
+	"strings"
+)
+
+
+
+func showColour() bool {
+	return os.Getenv("NO_COLOUR") == ""
+}
+
+func testStart(name string) {
+	fmt.Fprintf(os.Stderr, "%s:\n", name)
+}
+
+func testing(message string, body func()) {
+	if showColour() {
+		fmt.Fprintf(
+			os.Stderr,
+			"\033[0;33mtesting\033[0m: %s... ",
+			message,
+		)
+		body()
+		fmt.Fprintf(os.Stderr, "\033[0;32mOK\033[0m.\n")
+	} else {
+		fmt.Fprintf(os.Stderr, "testing: %s... ", message)
+		body()
+		fmt.Fprintf(os.Stderr, "OK.\n")
+	}
+}
+
+func assertEq(given any, expected any) {
+	if !reflect.DeepEqual(given, expected) {
+		if showColour() {
+			fmt.Fprintf(os.Stderr, "\033[0;31mERR\033[0m.\n")
+		} else {
+			fmt.Fprintf(os.Stderr, "ERR.\n")
+		}
+		fmt.Fprintf(os.Stderr, "given != expected\n")
+		fmt.Fprintf(os.Stderr, "given:    %#v\n", given)
+		fmt.Fprintf(os.Stderr, "expected: %#v\n", expected)
+		os.Exit(1)
+	}
+}
+
+
+func test_NewFrom() {
+	testStart("NewFrom()")
+
+	testing("we get the same UUID from the same input", func() {
+		const s = "abcdefghijklmnop"
+
+		r1 := strings.NewReader(s)
+		uuid1, err := NewFrom(r1)
+		assertEq(err, nil)
+
+		r2 := strings.NewReader(s)
+		uuid2, err := NewFrom(r2)
+		assertEq(err, nil)
+
+		assertEq(uuid1, uuid2)
+	})
+
+	testing("we the bytes in UUID are what the reader gives us", func() {
+		input := []byte{
+			0x00,
+			0x01,
+			0x02,
+			0x03,
+			0x04,
+			0x05,
+			0x06,
+			0x07,
+			0x08,
+			0x09,
+			0x0a,
+			0x0b,
+			0x0c,
+			0x0d,
+			0x0e,
+			0x0f,
+		}
+
+		expected := UUID{
+			0x00,
+			0x01,
+			0x02,
+			0x03,
+			0x04,
+			0x05,
+			0x06 + 0x40,
+			0x07,
+			0x08 + 0x80,
+			0x09,
+			0x0a,
+			0x0b,
+			0x0c,
+			0x0d,
+			0x0e,
+			0x0f,
+		}
+
+		r := bytes.NewReader(input)
+		given, err := NewFrom(r)
+		assertEq(err, nil)
+		assertEq(given, expected)
+	})
+
+	testing("v4 and variant markers", func() {
+		input := []byte{
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+			0x71,
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+		}
+
+		expected := UUID{
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+			0x41, // not 0x11
+			0x11,
+			0xb1, // not 0x11
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+			0x11,
+		}
+
+		r := bytes.NewReader(input)
+		given, err := NewFrom(r)
+		assertEq(err, nil)
+		assertEq(given, expected)
+	})
+}
+
+func test_New() {
+	testStart("New()")
+
+	testing("we can generate UUID values: ", func() {
+		var uuid UUID = New()
+		assertEq(len(uuid), 16)
+	})
+
+	testing("panic when the randomReader fails", func() {
+		savedReader := randomReader
+		randomReader = strings.NewReader("abc")
+		defer func() {
+			r := recover()
+			assertEq(r == nil, false)
+			randomReader = savedReader
+		}()
+
+		New()
+		os.Exit(5)
+	})
+}
+
+func test_String() {
+	testStart("UUID.String()")
+
+	testing("simple example values", func() {
+		uuids := []UUID {
+			UUID {
+				0, 0, 0, 0, 0, 0, 0, 0,
+				0, 0, 0, 0, 0, 0, 0, 0,
+			},
+			UUID {
+				0, 1,  2,  3,  4,  5,  6,  7,
+				8, 9, 10, 11, 12, 13, 14, 15,
+			},
+			UUID {
+				222, 222, 222, 222, 222, 222, 222, 222,
+				222, 222, 222, 222, 222, 222, 222, 222,
+			},
+			UUID {
+				255, 255, 255, 255, 255, 255, 255, 255,
+				255, 255, 255, 255, 255, 255, 255, 255,
+			},
+		}
+
+		strs := []string {
+			"00000000-0000-0000-0000-000000000000",
+			"00010203-0405-0607-0809-0a0b0c0d0e0f",
+			"dededede-dede-dede-dede-dededededede",
+			"ffffffff-ffff-ffff-ffff-ffffffffffff",
+		}
+
+		for i := range uuids {
+			s1 := uuids[i].String()
+			s2 := fmt.Sprintf("%v", uuids[i])
+			assertEq(s1, strs[i])
+			assertEq(s2, strs[i])
+		}
+	})
+}
+
+func test_FromString() {
+	testStart("FromString()")
+
+	testing("UUID -> string -> UUID round trip", func() {
+		for i := 0; i < 100; i++ {
+			uuid0 := New()
+			uuid1, err := FromString(uuid0.String())
+			assertEq(err, nil)
+			assertEq(uuid0, uuid1)
+		}
+	})
+
+	testing("errors we detect", func() {
+		var err error
+
+		_, err = FromString("")
+		assertEq(err, ErrBadLength)
+
+		_, err = FromString("---000000000000000000000000000000000")
+		assertEq(err, ErrBadDashCount)
+
+		_, err = FromString("----00000000000000000000000000000000")
+		assertEq(err, ErrBadDashPosition)
+
+		_, err = FromString("00000000-0000-0000-0000-00000000000g")
+		assertEq(err, hex.InvalidByteError('g'))
+
+		_, err = FromString("00000000-0000-0000-0000-000000000000")
+		assertEq(err, nil)
+	})
+}
+
+
+
+func MainTest() {
+	test_NewFrom()
+	test_New()
+	test_String()
+	test_FromString()
+}