Reorganize test dir to ensure test of installed pkg

tests/test_read_fanin/tb_template.sv

@@ -0,0 +1,34 @@
+{% extends "lib/tb_base.sv" %}
+
+{%- block declarations %}
+    {% sv_line_anchor %}
+    localparam REGWIDTH = {{cls.regwidth}};
+    localparam STRIDE = REGWIDTH/8;
+    localparam N_REGS = {{cls.n_regs}};
+{%- endblock %}
+
+
+{% block seq %}
+    {% sv_line_anchor %}
+    bit [REGWIDTH-1:0] data[N_REGS];
+
+    ##1;
+    cb.rst <= '0;
+    ##1;
+
+    foreach(data[i]) data[i] = {$urandom(), $urandom(), $urandom(), $urandom()};
+
+    for(int i=0; i<N_REGS; i++) begin
+        cpuif.assert_read(i*STRIDE, 'h1);
+    end
+
+    for(int i=0; i<N_REGS; i++) begin
+        cpuif.write(i*STRIDE, data[i]);
+    end
+
+    for(int i=0; i<N_REGS; i++) begin
+        cpuif.assert_read(i*STRIDE, data[i]);
+    end
+
+    assert($bits(dut.cpuif_wr_data) == REGWIDTH);
+{% endblock %}