Add tests for detect_virt segment

test/segments/detect_virt.spec

@@ -0,0 +1,68 @@
+#!/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=$0
+
+function setUp() {
+  export TERM="xterm-256color"
+  # Load Powerlevel9k
+  source powerlevel9k.zsh-theme
+}
+
+function testDetectVirtSegmentPrintsNothingIfSystemdIsNotAvailable() {
+    alias systemd-detect-virt="novirt"
+
+    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(detect_virt custom_world)
+    local POWERLEVEL9K_CUSTOM_WORLD='echo world'
+
+    assertEquals "%K{white} %F{black}world %k%F{white}%f " "$(build_left_prompt)"
+
+    unalias systemd-detect-virt
+}
+
+function testDetectVirtSegmentIfSystemdReturnsPlainName() {
+    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(detect_virt)
+    alias systemd-detect-virt="echo 'xxx'"
+
+    assertEquals "%K{black} %F{yellow}xxx %k%F{black}%f " "$(build_left_prompt)"
+
+    unalias systemd-detect-virt
+}
+
+function testDetectVirtSegmentIfRootFsIsOnExpectedInode() {
+    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(detect_virt)
+    # Well. This is a weak test, as it fixates the implementation,
+    # but it is necessary, as the implementation relys on the root
+    # directory having the inode number "2"..
+    alias systemd-detect-virt="echo 'none'"
+
+    # The original command in the implementation is "ls -di / | grep -o 2",
+    # which translates to: Show the inode number of "/" and test if it is "2".
+    alias ls="echo '2'"
+
+    assertEquals "%K{black} %F{yellow}none %k%F{black}%f " "$(build_left_prompt)"
+
+    unalias ls
+    unalias systemd-detect-virt
+}
+
+function testDetectVirtSegmentIfRootFsIsNotOnExpectedInode() {
+    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(detect_virt)
+    # Well. This is a weak test, as it fixates the implementation,
+    # but it is necessary, as the implementation relys on the root
+    # directory having the inode number "2"..
+    alias systemd-detect-virt="echo 'none'"
+
+    # The original command in the implementation is "ls -di / | grep -o 2",
+    # which translates to: Show the inode number of "/" and test if it is "2".
+    alias ls="echo '3'"
+
+    assertEquals "%K{black} %F{yellow}chroot %k%F{black}%f " "$(build_left_prompt)"
+
+    unalias ls
+    unalias systemd-detect-virt
+}
+
+source shunit2/source/2.1/src/shunit2