test: Add more kubectx tests (#111)

test/common.bash

@@ -0,0 +1,22 @@
+#!/usr/bin/env bats
+
+# bats setup function
+setup() {
+  export XDG_CACHE_HOME="$(mktemp -d)"
+  export KUBECONFIG="${XDG_CACHE_HOME}/config"
+}
+
+# bats teardown function
+teardown() {
+  rm -rf "$XDG_CACHE_HOME"
+}
+
+use_config() {
+  cp "$BATS_TEST_DIRNAME/testdata/$1" $KUBECONFIG
+}
+
+# wrappers around "kubectl config" command
+
+get_context() {
+    kubectl config current-context
+}

test/kubectx.bats

@@ -2,12 +2,88 @@
 
 COMMAND="$BATS_TEST_DIRNAME/../kubectx"
 
+load common
+
 @test "--help should not fail" {
   run ${COMMAND} --help
+  echo "$output"
   [ "$status" -eq 0 ]
 }
 
 @test "-h should not fail" {
   run ${COMMAND} -h
+  echo "$output"
   [ "$status" -eq 0 ]
 }
+
+@test "switch to previous context when no one exists" {
+  use_config config1
+
+  run ${COMMAND} -
+  echo "$output"
+  [ "$status" -eq 1 ]
+  [[ "$output" = "error: No previous context found." ]]
+}
+
+@test "create one context and list contexts" {
+  use_config config1
+
+  run ${COMMAND}
+  echo "$output"
+  [ "$status" -eq 0 ]
+  [[ "$output" = "user1@cluster1" ]]
+}
+
+@test "create two contexts and list contexts" {
+  use_config config2
+
+  run ${COMMAND}
+  echo "$output"
+  [ "$status" -eq 0 ]
+  [[ "$output" = *"user1@cluster1"* ]]
+  [[ "$output" = *"user2@cluster1"* ]]
+}
+
+@test "create two contexts and select contexts" {
+  use_config config2
+
+  run ${COMMAND} user1@cluster1
+  echo "$output"
+  [ "$status" -eq 0 ]
+  echo "$(get_context)"
+  [[ "$(get_context)" = "user1@cluster1" ]]
+
+  run ${COMMAND} user2@cluster1
+  echo "$output"
+  [ "$status" -eq 0 ]
+  echo "$(get_context)"
+  [[ "$(get_context)" = "user2@cluster1" ]]
+}
+
+@test "create two contexts and switch between contexts" {
+  use_config config2
+
+  run ${COMMAND} user1@cluster1
+  echo "$output"
+  [ "$status" -eq 0 ]
+  echo "$(get_context)"
+  [[ "$(get_context)" = "user1@cluster1" ]]
+
+  run ${COMMAND} user2@cluster1
+  echo "$output"
+  [ "$status" -eq 0 ]
+  echo "$(get_context)"
+  [[ "$(get_context)" = "user2@cluster1" ]]
+
+  run ${COMMAND} -
+  echo "$output"
+  [ "$status" -eq 0 ]
+  echo "$(get_context)"
+  [[ "$(get_context)" = "user1@cluster1" ]]
+
+  run ${COMMAND} -
+  echo "$output"
+  [ "$status" -eq 0 ]
+  echo "$(get_context)"
+  [[ "$(get_context)" = "user2@cluster1" ]]
+}

test/testdata/config1

@@ -0,0 +1,18 @@
+# config with one context
+
+apiVersion: v1
+clusters:
+- cluster:
+    server: ""
+  name: cluster1
+contexts:
+- context:
+    cluster: cluster1
+    user: user1
+  name: user1@cluster1
+current-context: ""
+kind: Config
+preferences: {}
+users:
+- name: user1
+  user: {}

test/testdata/config2

@@ -0,0 +1,24 @@
+# config with two contexts
+
+apiVersion: v1
+clusters:
+- cluster:
+    server: ""
+  name: cluster1
+contexts:
+- context:
+    cluster: cluster1
+    user: user1
+  name: user1@cluster1
+- context:
+    cluster: cluster1
+    user: user2
+  name: user2@cluster1
+current-context: ""
+kind: Config
+preferences: {}
+users:
+- name: user1
+  user: {}
+- name: user2
+  user: {}