Add tests for vi_mode segment

test/segments/vi_mode.spec

@@ -0,0 +1,38 @@
+#!/usr/bin/env zsh
+#vim:ft=zsh ts=2 sw=2 sts=2 et fenc=utf-8
+
+# Required for shunit2 to run correctly
+setopt shwordsplit
+SHUNIT_PARENT=$0
+
+function setUp() {
+  export TERM="xterm-256color"
+  # Load Powerlevel9k
+  source powerlevel9k.zsh-theme
+}
+
+function testViInsertModeWorks() {
+  local KEYMAP='viins'
+
+  assertEquals "%K{black} %F{blue}INSERT " "$(prompt_vi_mode left 1 false)"
+}
+
+function testViInsertModeWorksWhenLabeledAsMain() {
+  local KEYMAP='main'
+
+  assertEquals "%K{black} %F{blue}INSERT " "$(prompt_vi_mode left 1 false)"
+}
+
+function testViCommandModeWorks() {
+  local KEYMAP='vicmd'
+
+  assertEquals "%K{black} %F{white}NORMAL " "$(prompt_vi_mode left 1 false)"
+}
+
+function testViInsertModeStringIsCustomizable() {
+  local KEYMAP='viins'
+
+  assertEquals "%K{black} %F{blue}INSERT " "$(prompt_vi_mode left 1 false)"
+}
+
+source shunit2/source/2.1/src/shunit2