add tests for the spec checker

tests/dep_spec.lua

@@ -1,5 +1,6 @@
 ---@diagnostic disable: undefined-global, undefined-field
 local dep_ui_format = require("dep.ui.format")
+local dep_spec_man = require("dep.spec")
 
 describe("ui log formatting", function()
   it("returns the proper chunks to print a formatted line", function()
@@ -18,3 +19,52 @@ describe("ui log formatting", function()
     )
   end)
 end)
+
+describe("package specification", function()
+  it("gets the package's name", function()
+    assert.equal(dep_spec_man.get_name({ "user/package" }), "package")
+    assert.equal(dep_spec_man.get_name({ "user/package.git" }), "package.git")
+  end)
+
+  it("ensurses specs are in the proper format", function()
+    local correct = { "user/package" }
+    assert.same(dep_spec_man.correct_spec("user/package"), correct)
+    assert.same(dep_spec_man.correct_spec({ "user/package" }), correct)
+    assert.same(dep_spec_man.correct_spec({ { "user/package" } }), correct)
+  end)
+
+  it("checks a spec for correctness", function()
+    assert.same(
+      dep_spec_man.check({ "user/package" }, true),
+      { "user/package" }
+    )
+
+    assert.same(
+      dep_spec_man.check({
+        "user/package",
+        deps = "user/dependency"
+      }, true),
+      {
+        "user/package",
+        deps = {
+          "user/dependency"
+        }
+      }
+    )
+
+    assert.same(
+      dep_spec_man.check({
+        "user/package",
+        deps = {
+          { { "user/dependency" } }
+        }
+      }, true),
+      {
+        "user/package",
+        deps = {
+          "user/dependency"
+        }
+      }
+    )
+  end)
+end)