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code/vezba10/verif/test_lib.sv

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+`ifndef TEST_LIB_SV
+ `define TEST_LIB_SV
+
+//=============================================================================
+// Additional Calc1 tests, built on top of test_base.
+//=============================================================================
+
+//-----------------------------------------------------------------------------
+// Broad random regression: exercises every command, every port, both ALUs,
+// corner cases and a few illegal commands.  Good for coverage closure.
+//-----------------------------------------------------------------------------
+class test_random extends test_base;
+   `uvm_component_utils(test_random)
+
+   function new(string name = "test_random", uvm_component parent = null);
+      super.new(name,parent);
+   endfunction : new
+
+   task main_phase(uvm_phase phase);
+      calc_simple_seq        rnd;
+      calc_alu_seq           alu;
+      calc_shift_seq         sh;
+      calc_diff_port_seq     dp;
+      calc_same_port_seq     sp;
+      calc_shift_amounts_seq sa;
+      calc_corner_seq        cor;
+
+      phase.raise_objection(this);
+      `uvm_info(get_type_name(), "Starting random regression", UVM_LOW)
+
+      repeat (3) begin
+         rnd = calc_simple_seq::type_id::create("rnd");
+         void'(rnd.randomize());
+         rnd.start(env.agent.seqr);
+      end
+      alu = calc_alu_seq::type_id::create("alu");        void'(alu.randomize()); alu.start(env.agent.seqr);
+      sh  = calc_shift_seq::type_id::create("sh");       void'(sh.randomize());  sh.start(env.agent.seqr);
+      dp  = calc_diff_port_seq::type_id::create("dp");   void'(dp.randomize());  dp.start(env.agent.seqr);
+      sp  = calc_same_port_seq::type_id::create("sp");   void'(sp.randomize());  sp.start(env.agent.seqr);
+      sa  = calc_shift_amounts_seq::type_id::create("sa"); sa.start(env.agent.seqr);
+      cor = calc_corner_seq::type_id::create("cor");     cor.start(env.agent.seqr);
+
+      phase.drop_objection(this);
+   endtask : main_phase
+endclass : test_random
+
+//-----------------------------------------------------------------------------
+// Sanity test: only spec-conformant traffic.  Expected result: 0 UVM_ERRORs.
+// Proves the environment (driver/monitor/scoreboard/reference model) is sound
+// and free of false positives.
+//-----------------------------------------------------------------------------
+class test_sanity extends test_base;
+   `uvm_component_utils(test_sanity)
+
+   function new(string name = "test_sanity", uvm_component parent = null);
+      super.new(name,parent);
+   endfunction : new
+
+   task main_phase(uvm_phase phase);
+      calc_known_good_seq good;
+      phase.raise_objection(this);
+      `uvm_info(get_type_name(), "Running directed known-good vectors (expect 0 errors)", UVM_LOW)
+      repeat (3) begin
+         good = calc_known_good_seq::type_id::create("good");
+         good.start(env.agent.seqr);
+      end
+      phase.drop_objection(this);
+   endtask : main_phase
+endclass : test_sanity
+
+//-----------------------------------------------------------------------------
+// Directed corner / error test: overflow, underflow, equal-subtract, invalid.
+//-----------------------------------------------------------------------------
+class test_corner extends test_base;
+   `uvm_component_utils(test_corner)
+
+   function new(string name = "test_corner", uvm_component parent = null);
+      super.new(name,parent);
+   endfunction : new
+
+   task main_phase(uvm_phase phase);
+      calc_corner_seq        cor;
+      calc_invalid_seq       inv;
+      calc_shift_amounts_seq sa;
+
+      phase.raise_objection(this);
+      cor = calc_corner_seq::type_id::create("cor");          cor.start(env.agent.seqr);
+      inv = calc_invalid_seq::type_id::create("inv");         inv.start(env.agent.seqr);
+      sa  = calc_shift_amounts_seq::type_id::create("sa");    sa.start(env.agent.seqr);
+      phase.drop_objection(this);
+   endtask : main_phase
+endclass : test_corner
+
+//-----------------------------------------------------------------------------
+// Factory-override demo (Vezba 9, Zadatak): a transaction that never uses SUB.
+//-----------------------------------------------------------------------------
+class calc_seq_item_no_sub extends calc_seq_item;
+   `uvm_object_utils(calc_seq_item_no_sub)
+   constraint c_no_sub { cmd != CMD_SUB; }
+   function new(string name = "calc_seq_item_no_sub");
+      super.new(name);
+   endfunction
+endclass : calc_seq_item_no_sub
+
+class test_no_sub extends test_base;
+   `uvm_component_utils(test_no_sub)
+
+   calc_simple_seq simple_seq;
+
+   function new(string name = "test_no_sub", uvm_component parent = null);
+      super.new(name,parent);
+   endfunction : new
+
+   function void build_phase(uvm_phase phase);
+      super.build_phase(phase);
+      // every calc_seq_item created in the environment becomes a no-sub item
+      calc_seq_item::type_id::set_type_override(calc_seq_item_no_sub::get_type());
+      simple_seq = calc_simple_seq::type_id::create("simple_seq");
+   endfunction : build_phase
+
+   task main_phase(uvm_phase phase);
+      phase.raise_objection(this);
+      void'(simple_seq.randomize());
+      simple_seq.start(env.agent.seqr);
+      phase.drop_objection(this);
+   endtask : main_phase
+endclass : test_no_sub
+
+`endif