add coursesConnection to Terms

refs: GQL-62

Test plan:
  * query term
  * term should have courses

Change-Id: Ib933f2199bffd5d2599a1ee654a93417337e4356
Reviewed-on: https://gerrit.instructure.com/192614
Tested-by: Jenkins
Reviewed-by: Cameron Matheson <cameron@instructure.com>
QA-Review: Cameron Matheson <cameron@instructure.com>
Product-Review: Cameron Matheson <cameron@instructure.com>

app/graphql/types/grades_type.rb

@@ -22,6 +22,12 @@ module Types
 
     description "Contains grade information for a course or grading period"
 
+    class GradeState < BaseEnum
+      graphql_name "GradeState"
+      value "active"
+      value "deleted"
+    end
+
     field :current_score, Float, <<~DESC, null: true
       The current score includes all graded assignments, excluding muted submissions.
     DESC
@@ -59,6 +65,8 @@ module Types
       load_association :grading_period
     end
 
+    field :state, GradeState, method: :workflow_state, null: false
+
     field :assignment_group, AssignmentGroupType, null: true
     def assignment_group
       load_association(:assignment_group)

app/graphql/types/term_type.rb

@@ -21,11 +21,23 @@ module Types
     implements GraphQL::Types::Relay::Node
     graphql_name "Term"
 
+    alias term object
+
     global_id_field :id
     field :_id, ID, "legacy canvas id", method: :id, null: false
 
     field :name, String, null: true
     field :start_at, DateTimeType, null: true
     field :end_at, DateTimeType, null: true
+
+    field :courses_connection, CourseType.connection_type, null: true do
+      description "courses for this term"
+    end
+    def courses_connection
+      load_association(:root_account).then do |account|
+        next unless account.grants_any_right?(current_user, :manage_courses, :manage_account_settings)
+        term.courses
+      end
+    end
   end
 end

schema.graphql

@@ -752,6 +752,41 @@ type Course implements AssignmentsConnectionInterface & Node & Timestamped {
   ): UserConnection
 }
 
+"""
+The connection type for Course.
+"""
+type CourseConnection {
+  """
+  A list of edges.
+  """
+  edges: [CourseEdge]
+
+  """
+  A list of nodes.
+  """
+  nodes: [Course]
+
+  """
+  Information to aid in pagination.
+  """
+  pageInfo: PageInfo!
+}
+
+"""
+An edge in a connection.
+"""
+type CourseEdge {
+  """
+  A cursor for use in pagination.
+  """
+  cursor: String!
+
+  """
+  The item at the end of the edge.
+  """
+  node: Course
+}
+
 """
 Users in a course can be returned based on these enrollment states
 """
@@ -1002,6 +1037,11 @@ type File implements ModuleItemInterface & Node & Timestamped {
   url: URL
 }
 
+enum GradeState {
+  active
+  deleted
+}
+
 """
 Contains grade information for a course or grading period
 """
@@ -1032,6 +1072,7 @@ type Grades {
   The override score. Supersedes the computed final score if set.
   """
   overrideScore: Float
+  state: GradeState!
   unpostedCurrentGrade: String
 
   """
@@ -2466,6 +2507,31 @@ type Term implements Node {
   legacy canvas id
   """
   _id: ID!
+
+  """
+  courses for this term
+  """
+  coursesConnection(
+    """
+    Returns the elements in the list that come after the specified cursor.
+    """
+    after: String
+
+    """
+    Returns the elements in the list that come before the specified cursor.
+    """
+    before: String
+
+    """
+    Returns the first _n_ elements from the list.
+    """
+    first: Int
+
+    """
+    Returns the last _n_ elements from the list.
+    """
+    last: Int
+  ): CourseConnection
   endAt: DateTime
   id: ID!
   name: String

spec/graphql/types/grades_type_spec.rb

@@ -107,5 +107,9 @@ describe Types::GradesType do
     it "resolves the gradingPeriod field to the score's associated grading period" do
       expect(resolve_grades_field("gradingPeriod { title }")).to eq 'Pleistocene'
     end
+
+    it "resolves the state field to the Score's workflow_state" do
+      expect(resolve_grades_field("state")).to eq 'active'
+    end
   end
 end

spec/graphql/types/term_type_spec.rb

@@ -25,14 +25,23 @@ describe Types::TermType do
     course_with_student(active_all: true)
     @term = @course.enrollment_term
     @term_type = GraphQLTypeTester.new(@term, current_user: @teacher)
+    @admin = account_admin_user
   end
 
   it "works" do
-    expect(@term_type.resolve("_id")).to eq @term.id.to_s
-    expect(@term_type.resolve("name")).to eq @term.name
+    expect(@term_type.resolve("_id", current_user: @teacher)).to eq @term.id.to_s
+    expect(@term_type.resolve("name", current_user: @teacher)).to eq @term.name
   end
 
   it "requires read permission" do
     expect(@term_type.resolve("_id", current_user: @student)).to be_nil
   end
+
+  it 'should have coursesConnection' do
+    expect(@term_type.resolve("coursesConnection { nodes { _id } }", current_user: @admin)).to eq [@course.id.to_s]
+  end
+
+  it 'should require admin privilege' do
+    expect(@term_type.resolve("coursesConnection { nodes { _id } }", current_user: @student)).to be_nil
+  end
 end