[RFC PATCH v3 2/2] Add tests for rev-list --bisect* --first-parent

@@ -263,4 +263,43 @@ test_expect_success 'rev-parse --bisect can default to good/bad refs' '
 	test_cmp expect.sorted actual.sorted
 '
 
+# We generate the following commit graph:
+#
+#     A
+#    / \
+#   D   B
+#   |   |
+#   EX  C
+#    \  /
+#     FX
+
+test_expect_success 'setup' '
+  test_commit A &&
+  test_commit B &&
+  test_commit C &&
+  git reset --hard A &&
+  test_commit D &&
+  test_commit EX &&
+  test_merge FX C
+'
+
+test_output_expect_success "--bisect --first-parent" 'git rev-list --bisect --first-parent FX ^A' <<EOF
+$(git rev-parse EX)
+EOF
+
+test_output_expect_success "--bisect-vars --first-parent" 'git rev-list --bisect-vars --first-parent FX ^A' <<EOF
+bisect_rev='$(git rev-parse EX)'
+bisect_nr=1
+bisect_good=0
+bisect_bad=1
+bisect_all=3
+bisect_steps=1
+EOF
+
+test_output_expect_success "--bisect-all --first-parent" 'git rev-list --bisect-all --first-parent FX ^A' <<EOF
+$(git rev-parse D) (dist=1)
+$(git rev-parse EX) (dist=1)
+$(git rev-parse FX) (dist=0)
+EOF
+
 test_done