Improve test case, adding a case of the deps being fully removed,

and a case of deps being only partially removed.

Author: amartani

gazelle/python/testdata/clear_out_deps/BUILD.in

@@ -1,9 +1 @@
-load("@rules_python//python:defs.bzl", "py_library")
-
-py_library(
-    name = "clear_out_deps",
-    srcs = ["__init__.py"],
-    deps = [":removed_a"],
-    visibility = ["//:__subpackages__"],
-    pyi_deps = [":removed_b"],
-)
+# gazelle:python_generate_pyi_deps true

gazelle/python/testdata/clear_out_deps/BUILD.out

@@ -1,7 +1 @@
-load("@rules_python//python:defs.bzl", "py_library")
-
-py_library(
-    name = "clear_out_deps",
-    srcs = ["__init__.py"],
-    visibility = ["//:__subpackages__"],
-)
+# gazelle:python_generate_pyi_deps true

gazelle/python/testdata/clear_out_deps/README.md

@@ -3,3 +3,7 @@
 This test case asserts that an existing `py_library` specifying `deps` and
 `pyi_deps` have these attributes removed if the corresponding imports are
 removed.
+
+`a/BUILD.in` declares `deps`/`pyi_deps` on non-existing libraries, `b/BUILD.in` declares dependency on `//a`
+without a matching import, and `c/BUILD.in` declares both `deps` and `pyi_deps` as `["//a", "//b"]`, but
+it should have only `//a` as `deps` and only `//b` as `pyi_deps`.

gazelle/python/testdata/clear_out_deps/__init__.py

@@ -0,0 +1,9 @@
+load("@rules_python//python:defs.bzl", "py_library")
+
+py_library(
+    name = "a",
+    srcs = ["__init__.py"],
+    pyi_deps = ["//:nonexistent_pyi_dep"],
+    visibility = ["//:__subpackages__"],
+    deps = ["//nonexistent_dep"],
+)

gazelle/python/testdata/clear_out_deps/a/BUILD.in

@@ -0,0 +1,7 @@
+load("@rules_python//python:defs.bzl", "py_library")
+
+py_library(
+    name = "a",
+    srcs = ["__init__.py"],
+    visibility = ["//:__subpackages__"],
+)

gazelle/python/testdata/clear_out_deps/a/BUILD.out

@@ -0,0 +1,9 @@
+load("@rules_python//python:defs.bzl", "py_library")
+
+py_library(
+    name = "b",
+    srcs = ["__init__.py"],
+    pyi_deps = ["//a"],
+    visibility = ["//:__subpackages__"],
+    deps = ["//a"],
+)

gazelle/python/testdata/clear_out_deps/a/__init__.py

@@ -0,0 +1,7 @@
+load("@rules_python//python:defs.bzl", "py_library")
+
+py_library(
+    name = "b",
+    srcs = ["__init__.py"],
+    visibility = ["//:__subpackages__"],
+)