t1091/t3705: remove 'test-tool read-cache --table'

Now that 'git ls-files --sparse' exists, we can use it to verify the
state of a sparse index instead of 'test-tool read-cache table'. Replace
these usages within t1091-sparse-checkout-builtin.sh and
t3705-add-sparse-checkout.sh.

The important changes are due to the different output format. In t3705,
we need to use the '--stage' output to get a file mode and OID, but
it also includes a stage value and drops the object type. This leads
to some differences in how we handle looking for specific entries.

In t1091, the test focuses on enabling the sparse index, so we do not
need the --stage flag to demonstrate how the index changes, and instead
can use a diff.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t1091-sparse-checkout-builtin.sh

@@ -212,12 +212,27 @@ test_expect_success 'sparse-index enabled and disabled' '
 
 		git -C repo sparse-checkout init --cone --sparse-index &&
 		test_cmp_config -C repo true index.sparse &&
-		test-tool -C repo read-cache --table >cache &&
-		grep " tree " cache &&
-
+		git -C repo ls-files --sparse >sparse &&
 		git -C repo sparse-checkout disable &&
-		test-tool -C repo read-cache --table >cache &&
-		! grep " tree " cache &&
+		git -C repo ls-files --sparse >full &&
+
+		cat >expect <<-\EOF &&
+		@@ -1,4 +1,7 @@
+		 a
+		-deep/
+		-folder1/
+		-folder2/
+		+deep/a
+		+deep/deeper1/a
+		+deep/deeper1/deepest/a
+		+deep/deeper2/a
+		+folder1/a
+		+folder2/a
+		EOF
+
+		diff -u sparse full | tail -n +3 >actual &&
+		test_cmp expect actual &&
+
 		git -C repo config --list >config &&
 		! grep index.sparse config
 	)

t/t3705-add-sparse-checkout.sh

@@ -181,13 +181,13 @@ test_expect_success 'git add fails outside of sparse-checkout definition' '
 	# Avoid munging CRLFs to avoid an error message
 	git -c core.autocrlf=input add --sparse sparse_entry 2>stderr &&
 	test_must_be_empty stderr &&
-	test-tool read-cache --table >actual &&
-	grep "^100644 blob.*sparse_entry\$" actual &&
+	git ls-files --stage >actual &&
+	grep "^100644 .*sparse_entry\$" actual &&
 
 	git add --sparse --chmod=+x sparse_entry 2>stderr &&
 	test_must_be_empty stderr &&
-	test-tool read-cache --table >actual &&
-	grep "^100755 blob.*sparse_entry\$" actual &&
+	git ls-files --stage >actual &&
+	grep "^100755 .*sparse_entry\$" actual &&
 
 	git reset &&