test(feat): add tests for local branch detection for lib.git.branch

tests/git_branch_spec.lua

@@ -0,0 +1,52 @@
+local gb = require("neogit.lib.git.branch")
+local status = require("neogit.status")
+local plenary_async = require("plenary.async")
+local git_harness = require("tests.util.git_harness")
+local util = require("tests.util.util")
+
+describe("git branch lib", function()
+  describe("local branches", function()
+    local branches = {}
+    local repo_dir = nil
+
+    before_each(function()
+      repo_dir = git_harness.prepare_repository()
+      plenary_async.util.block_on(status.reset)
+
+      branches = {
+        "test-branch",
+        "tester",
+        "test/some-issue",
+        "num-branch=123",
+        "deeply/nested/branch/name",
+      }
+
+      for _, branch in ipairs(branches) do
+        vim.fn.system("git branch " .. branch)
+
+        if vim.v.shell_error ~= 0 then
+          error("Unable to create testing branch: " .. branch)
+        end
+      end
+
+      table.insert(branches, "master")
+      table.insert(branches, "second-branch")
+
+      require("neogit").setup()
+
+      print("Branches:\n  " .. vim.inspect(branches))
+    end)
+
+    it("properly detects all local branches", function()
+      local branches_detected = gb.get_local_branches(true)
+      print("Branches Detected:\n  " .. vim.inspect(branches_detected))
+      assert.True(util.lists_equal(branches, branches_detected))
+    end)
+
+    after_each(function()
+      git_harness.cleanup_repository(repo_dir)
+      repo_dir = nil
+      branches = {}
+    end)
+  end)
+end)

tests/util/util.lua

@@ -0,0 +1,21 @@
+local M = {}
+
+---Checks if both lists contain the same values. This does NOT check ordering.
+---@param l1 any[]
+---@param l2 any[]
+---@return boolean
+function M.lists_equal(l1, l2)
+  if #l1 ~= #l2 then
+    return false
+  end
+
+  for _, value in ipairs(l1) do
+    if not vim.tbl_contains(l2, value) then
+      return false
+    end
+  end
+
+  return true
+end
+
+return M