t/t4202-log.sh: Add testcases

Add testcases for 'git log --diff-filter=[CM]' (copies and renames).
Also add a testcase for 'git log --follow'.

Signed-off-by: Arjen Laarhoven <arjen@yaph.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t4202-log.sh

@@ -16,27 +16,31 @@ test_expect_success setup '
 	test_tick &&
 	git commit -m second &&
 
+	git mv one ichi &&
+	test_tick &&
+	git commit -m third &&
+
+	cp ichi ein &&
+	git add ein &&
+	test_tick &&
+	git commit -m fourth &&
+
 	mkdir a &&
 	echo ni >a/two &&
 	git add a/two &&
 	test_tick &&
-	git commit -m third &&
+	git commit -m fifth  &&
 
-	echo san >a/three &&
+	git rm a/two &&
-	git add a/three &&
 	test_tick &&
-	git commit -m fourth &&
+	git commit -m sixth
-
-	git rm a/three &&
-	test_tick &&
-	git commit -m fifth
 
 '
 
 test_expect_success 'diff-filter=A' '
 
 	actual=$(git log --pretty="format:%s" --diff-filter=A HEAD) &&
-	expect=$(echo fourth ; echo third ; echo initial) &&
+	expect=$(echo fifth ; echo fourth ; echo third ; echo initial) &&
 	test "$actual" = "$expect" || {
 		echo Oops
 		echo "Actual: $actual"
@@ -60,7 +64,43 @@ test_expect_success 'diff-filter=M' '
 test_expect_success 'diff-filter=D' '
 
 	actual=$(git log --pretty="format:%s" --diff-filter=D HEAD) &&
-	expect=$(echo fifth) &&
+	expect=$(echo sixth ; echo third) &&
+	test "$actual" = "$expect" || {
+		echo Oops
+		echo "Actual: $actual"
+		false
+	}
+
+'
+
+test_expect_success 'diff-filter=R' '
+
+	actual=$(git log -M --pretty="format:%s" --diff-filter=R HEAD) &&
+	expect=$(echo third) &&
+	test "$actual" = "$expect" || {
+		echo Oops
+		echo "Actual: $actual"
+		false
+	}
+
+'
+
+test_expect_success 'diff-filter=C' '
+
+	actual=$(git log -C -C --pretty="format:%s" --diff-filter=C HEAD) &&
+	expect=$(echo fourth) &&
+	test "$actual" = "$expect" || {
+		echo Oops
+		echo "Actual: $actual"
+		false
+	}
+
+'
+
+test_expect_success 'git log --follow' '
+
+	actual=$(git log --follow --pretty="format:%s" ichi) &&
+	expect=$(echo third ; echo second ; echo initial) &&
 	test "$actual" = "$expect" || {
 		echo Oops
 		echo "Actual: $actual"
@@ -72,6 +112,7 @@ test_expect_success 'diff-filter=D' '
 test_expect_success 'setup case sensitivity tests' '
 	echo case >one &&
 	test_tick &&
+	git add one
 	git commit -a -m Second
 '