Add tests for scoop reset scoop command

test/Scoop-Reset.Tests.ps1

@@ -0,0 +1,70 @@
+set-alias scoop "$psscriptroot/../bin/scoop.ps1"
+
+describe "'scoop reset scoop'" {
+  beforeall {
+    remove-item "~/.bashrc.scoop" -ea ignore
+  }
+
+  function alias_count {
+    (gc "~/.bashrc" | where { $_ -eq 'alias scoop="powershell scoop.ps1"' } | measure).count
+  }
+
+  function backup_bashrc_if_exists {
+    # back up .bashrc if it exists
+    if(test-path "~/.bashrc") {
+      move-item "~/.bashrc" "~/.bashrc.scoop"
+    }
+  }
+
+  function restore_bashrc_if_exists {
+    # restore backup
+    if(test-path "~/.bashrc.scoop") {
+      move-item "~/.bashrc.scoop" "~/.bashrc"
+
+      "~/.bashrc.scoop" | should not exist
+      "~/.bashrc" | should exist
+    }
+  }
+
+  context "no .bashrc" {
+    it "creates .bashrc when it doesn't exist" {
+      backup_bashrc_if_exists
+
+      "~/.bashrc" | should not exist
+      scoop reset scoop
+      "~/.bashrc" | should exist
+      alias_count | should be 1
+
+      # cleanup
+      remove-item "~/.bashrc"
+
+      restore_bashrc_if_exists
+    }
+  }
+
+  context "bash scoop alias exists" {
+    it "does not create another bash scoop alias" {
+      # call it once to create it if it doesn't exist
+      scoop reset scoop
+      alias_count | should be 1
+
+      scoop reset scoop
+      alias_count | should be 1
+    }
+  }
+
+  context "bash scoop alias doesn't exist" {
+    it "creates bash scoop alias" {
+      backup_bashrc_if_exists
+      new-item -type file "~/.bashrc"
+
+      alias_count | should be 0
+
+      scoop reset scoop
+      alias_count | should be 1
+
+      remove-item "~/.bashrc"
+      restore_bashrc_if_exists
+    }
+  }
+}